This auction is for 1 tube ; there are 4 available.

Mullard 12at7 tube as pictured ; Pick the one(s) want ~ test results asre pictured

The measurements provided were made on a Triplett 3444 that has been modified to test tubes in accordance with the original manufacturer’s stated test conditions, including bogey values. 

This includes the use of cathode bias where specified.  This tester was prepared by Paul Hart of Roswell, GA.

Further information is available on request.


Industry Transconductance Bogie = 5500/5500µmhos

         Industry Plate Current Bogie = 11.0/11.0mA

                                             Results =   
                                                          
                                                   ~  PICTURED ~

Usa Shipping $6 ~ Overseas $14 - $45 

GST#3